Automatic trimming mechanism of numerical control spinning device

The utility model relates to an automatic trimming mechanism of a numerical control spinning device, and belongs to parts of a numerical control spinning processing device in the field of machining. A guide rail is fixedly connected with a lower bracket body, the lower portion of an upper sliding body is connected with the guide rail in a sliding mode, a driving oil cylinder is located inside the upper sliding body, a cylinder body plate of the driving oil cylinder is fixedly connected with one end of the upper sliding body, the front end of an oil cylinder pole is fixedly connected with a bracket body plate of the side face of the lower bracket body, a cutting shaft is fixedly connected with the other end of the upper sliding body, an attached wheel is connected with the outer side of the cutting shaft through a bearing in a sleeved mode, a cutting wheel is fixedly connected to the outer side of the attached wheel in a sleeved mode, and end cover flanges are fixedly connected with both ends of the attached w